Last night I wanted to change something in my toc.ncx. Since it was a relative easy S&R, instead of a heading '1' I wanted it to be 'Chapter 1', I wanted to use RegEx for it.
No problemo, the RegEx for that is relatively simple. Upon execute, it crashed. I tried several times and it kept crashing. I know for sure that it did work in previous versions.

While I am typing this, I wonder if I had the search mode to 'active HTML' instead of 'current document' while having the toc.ncx as the active tab.
Even if that is the case, I would still not expect Sigil to crash. I would expect either a warning or an automatic change in search mode.

Last night I wanted to change something in my toc.ncx. Since it was a relative easy S&R, instead of a heading '1' I wanted it to be 'Chapter 1', I wanted to use RegEx for it.
No problemo, the RegEx for that is relatively simple. Upon execute, it crashed. I tried several times and it kept crashing. I know for sure that it did work in previous versions.

While I am typing this, I wonder if I had the search mode to 'active HTML' instead of 'current document' while having the toc.ncx as the active tab.
Even if that is the case, I would still not expect Sigil to crash. I would expect either a warning or an automatic change in search mode.

I will test further tonight.

Could you post your F&R strings? I have been having problems with crashes when doing F&Rs (all HTML) but can't get a handle on the problem. I think it may something to do with making changes with <h> tags but I can;t be sure.

Could you post your F&R strings? I have been having problems with crashes when doing F&Rs (all HTML) but can't get a handle on the problem. I think it may something to do with making changes with <h> tags but I can;t be sure.

There is a known S&R issue in 5.3 and the circumstances remind me strongly on this. I saw this in the 5.3 release thread. "If searching in css with "all html" on Sigil crashes if the search-string is not found in one of the normal html-files"

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Edit: A crash with "current file" on was not mentioned in the thread i'm talking about.

In 'current file' it works. In a way it makes sense that if you search in a non-HTML file, but specify that it must look in the current HTML file that this won't work. A crash is something else though...